Sorry for the confusion - there's no transcoding going on. When our import/decode codecs are installed and being used to decode the video - there's a description information field that QuickTime asks for for just informational purposes - which we label with "Calibrated [whatever codec is being used]". It's just there for informational purposes and no transcoding is being done on the file.

Also I think UDF is a type of filesystem (like Fat32, NTFS, HFS+,etc) and not a 'file'. And our software would not influence any download speeds as that would be handled by the operating system and external device you are downloading from.